Upright ULII-25, Руководство по обслуживанию и запасным частям

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5-4 UL-25/32/40/48 Portable Personnel Lifts
Troubleshooting
Section
2a) Motor does not run.
2b) Motor runs but will not raise.
2c) Motor attempts to start but
machine turns off and then restarts in
five seconds.
2) Check circuit board for correct output. Open the lid on the lower control
box. Using a voltmeter, check the voltage terminal S27 found on the upper
right hand side of the circuit board. See drawing. Turn on ignition key and pull
out both E-Stop switches. Depress the common and down switches on the
upper control box.
Continue to step 3.
a) Hydraulic system failure.
b) Damaged or improperly connected
motor harness.
c) Damaged pump solenoid.
a) Improperly connected or damaged
motor harness.
b) Improperly connected or damaged coil
cord or upper control box.
c) Damaged pump solenoid.
d) Extension harness excessive in length.
e) Low line voltage.
f) Damaged pump motor.
1a) S28 is less than battery voltage.
1b) GND is not zero volts.
1c) Battery voltage is found at S28 and
zero volts is found on GND.
All voltages are referenced to Battery ground. Using a voltmeter, place the negative
probe directly to the negative pole of the battery. If equipped with battery back up,
remove back up battery before proceeding. Disconnect both chassis connector and
coil cord connector from the control box.
1) Turn off key switch and E-Stop switch. Check power connections on circuit
board S28 and GND found on the lower right hand side of the circuit board.
See drawing (Page 5-5).
a) Improperly connected or damaged
motor harness.
b) Poor battery connections.
a) Improperly connected or damaged
motor harness.
a) Battery power is present at PCB.
Continue to step 2.
2a) No voltage is found on either
terminal.
2b) Voltage is found only on one of the
two key switch terminals.
2c) Voltage is found at both sides of the
key switch.
2) Check for voltage at the terminals of the key switch. Turn the key switch on
and the E-Stop switch off.
a) Circuit board is damaged. Replace
circuit board.
a) Ignition key switch is faulty. Replace
ignition key switch.
a) Key switch is working properly.
Continue to step 3.
3a) Voltage at pin 6 does not exist or is
less than 11 volts DC.
3b) Voltage at ground pin 1 is not zero.
3c) Voltage at pin 6 is between 10 and
12 VDC, voltage at pin 1 is zero.
3) Check for voltage at the terminals of the key switch. Turn the key switch on
and the E-Stop switch off.
a) Circuit board is damaged.
a) Circuit board is damaged.
b) Ground on motor harness damaged or
connected improperly.
Continue to step 4.
4a) Pin 6 is not between 10 and 12 VDC.
4b) Voltage at ground pin 1 is not zero.
4) Plug in Chassis harness. Turn on ignition key, turn off E-Stop switch. Check
voltages at pin 1 and pin 6 of the chassis harness. This may require the use of a
sharp probe to pierce the insulation of the corresponding wires.
a) Damaged or shorted chassis harness.
a) Circuit board is damaged.
b) Ground on motor harness damaged or
connected improperly.
1a) Outrigger lights do not turn on.
1b) Outrigger lights turn on immediately
and five second delay is not present.
1c) Fewer than four indicator lights
operate.
1d) All four indicator lights turn on five
seconds after ignition key is turned on.
1) Does the lift turn on? Make sure all outriggers are extended and raised. Turn
off the E-Stop switch and turn on the ignition key. Wait five seconds for
machine to turn on and outrigger lifgts to light.
LIFT DOES NOT TURN ON - DC
LIFT DOES NOT RAISE - DC
2a) Motor does not run.
2b) Motor runs but will not raise.
2c) Lift turns off and restarts in five
seconds.
a) See section LIFT DOES NOT TURN ON.
b) Circuit board is damaged. Replace
circuit board.
a) Indicator light is damaged.
b) Chassis harness damaged or
incorrectly connected.
c) Outrigger limit switch defective or
improperly connected.
a) Continnue to step 2.
2) Pull out both E-Stop switches. Activate the common and up switch on the
upper control box.
a) Continue to step 3.
a) Hydraulic system failure.
b) Coil cord is damaged
c) Damaged or improperly connected
pump solenoids.
a) Improperly connected or damaged
motor harness.
b) Improperly connected or damaged
coil cord or upper control box.
c) Damaged pump solenoid or motor
solenoid.
d) Battery charge is low.
3a) No voltage is present at either of
the terminals on the E-Stop switch.
3b) Voltage is present on both
terminals of the E-Stop switch.
3c) Voltage is only present at one side
of the E-Stop switch.
3) Open the lid on the lower control box. Check for voltage at the E-Stop
switch. Ignition key is turned on E-Stop is pulled out on both the upper box
and lower box.
a) Circuit board is damaged. Replace
circuit board.
a) Check for correct operation of upper
E-Stop switch. Continue to step 4.
a) Replace E-Stop switch in whole or in
part.
4a) When button is pressed, 10-12
VDC is not present at pin S26.
4b) When up button is pressed, 10-12
VDC is present at pin S26.
4) Click circuit board lift circuit. Place voltmeter probe at terminal S26 at the
upper right hand side of the circuit board. See drawing (Page 5-5). Activate the
common and up switch on the upper control box.
a) Improperly connected or damaged
coil cord or upper control box.
b) Damaged circuit board.
a) Damaged or improperly wired
motor harness.
b) Damaged motor starter relay.
Table 5-1: Troubleshooting (cont'd)
5.1